COIN-OR::LEMON - Graph Library

source: lemon-0.x/gui/graph_displayer_canvas.h @ 1814:0f02ced2e2ba

Last change on this file since 1814:0f02ced2e2ba was 1814:0f02ced2e2ba, checked in by Hegyi Péter, 14 years ago

As initial value of a new map expression with ()+-/* operators can be given. These operators work on numbers, or on maps. If maps are given, then the new value for a given graph element will be calculated using the value from the given maps that belong to that graph element.

File size: 5.9 KB
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1// -*- C++ -*- //
2
3#ifndef GRAPH_DISPLAYER_CANVAS_H
4#define GRAPH_DISPLAYER_CANVAS_H
5
6class GraphDisplayerCanvas;
7
8#include "all_include.h"
9#include "mapstorage.h"
10#include "broken_edge.h"
11#include "map_win.h"
12#include <libgnomecanvasmm.h>
13#include <libgnomecanvasmm/polygon.h>
14
15///This class is the canvas, on which the graph can be drawn.
16class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
17{
18  typedef Gnome::Canvas::CanvasAA Parent;
19
20public:
21  GraphDisplayerCanvas(MapStorage &, MapWin &, Gtk::Window *);
22  virtual ~GraphDisplayerCanvas();
23
24  ///Changes the linewidth attribute according to the given map.
25  ///\param mapname is the name of the map which contains the new values
26  int changeEdgeWidth (std::string mapname, Edge new_item=INVALID);
27  int resetEdgeWidth (Edge new_item=INVALID);
28
29  ///Changes the linecolor attribute according to the given map.
30  ///\param mapname is the name of the map which contains the new values
31  int changeEdgeColor (std::string mapname, Edge new_item=INVALID);
32  int resetEdgeColor (Edge new_item=INVALID);
33
34  ///Changes the text of line attribute according to the given map.
35  ///\param mapname is the name of the map which contains the new values
36  int changeEdgeText (std::string mapname, Edge new_item=INVALID);
37  int resetEdgeText (Edge new_item=INVALID);
38
39  ///Changes the linewidth attribute according to the given map.
40  ///\param mapname is the name of the map which contains the new values
41  int changeNodeRadius (std::string mapname, Node new_item=INVALID);
42  int resetNodeRadius (Node new_item=INVALID);
43
44  ///Changes the linecolor attribute according to the given map.
45  ///\param mapname is the name of the map which contains the new values
46  int changeNodeColor (std::string mapname, Node new_item=INVALID);
47  int resetNodeColor (Node new_item=INVALID);
48
49  ///Changes the text of line attribute according to the given map.
50  ///\param mapname is the name of the map which contains the new values
51  int changeNodeText (std::string mapname, Node new_item=INVALID);
52  int resetNodeText (Node new_item=INVALID);
53
54  ///Callback for 'ViewZoomIn' action.
55  virtual void zoomIn();
56  ///Callback for 'ViewZoomOut' action.
57  virtual void zoomOut();
58  ///Callback for 'ViewZoomFit' action.
59  virtual void zoomFit();
60  ///Callback for 'ViewZoom100' action.
61  virtual void zoom100();
62  ///Sets the scroll region of the convas to the bounding box of the graph.
63  void updateScrollRegion();
64
65  ///This function changes the tool in the graph-editor's hand
66  void changeEditorialTool(int);
67
68protected:
69
70  //maximizing, minimizing, restoring window, etc.
71  virtual bool on_expose_event(GdkEventExpose *);
72
73private:
74
75  ///This function is responsible for the correct
76  ///reaction of any action happened in the territory
77  ///of the canvas
78  ///DEPRECATED!!!!
79  bool eventHandler(GdkEvent* e, Node n);
80
81  ///actual event handler
82  ///
83  ///Actual event handler should be stored, to be able to disconnect it and later reconnect it.
84  sigc::connection actual_handler;
85
86  ///event handler for the case when move-tool is active
87  bool moveEventHandler(GdkEvent*);
88  ///event handler for the case when create_node-tool is active
89  bool createNodeEventHandler(GdkEvent*);
90  ///event handler for the case when create_edge-tool is active
91  bool createEdgeEventHandler(GdkEvent*);
92  ///event handler for the case when eraser-tool is active
93  bool eraserEventHandler(GdkEvent*);
94  ///event handler for the case when edge map editor tool is active
95  bool edgeMapEditEventHandler(GdkEvent*);
96  ///event handler for the case when node map editor tool is active
97  bool nodeMapEditEventHandler(GdkEvent*);
98
99public:
100  ///Moves the text to new place
101  void textReposition(xy<double>);
102  ///Activates an edge belonging to a BrokenEdge
103  ///
104  ///After we have activated an edge this way,
105  ///the GDC object will know, which edge is under forming
106  ///therefore it can redraw the necessarz elementy on the canvas,
107  ///for example the text belonging to the \ref BrokenEdge can be
108  ///redrawn (\ref textReposition).
109  void toggleEdgeActivity(BrokenEdge*, bool);
110
111public:
112  ///\return the actual tool in hand
113  int getActualTool();
114
115  void drawGraph();
116  void clear();
117
118  ///creates a new Nodemap
119  int addNewNodeMap(double,std::string);
120  ///creates a new Edgemap
121  int addNewEdgeMap(double,std::string);
122
123private:
124  ///Deletes the given element.
125  void deleteItem(Node);
126  ///Deletes the given element.
127  void deleteItem(Edge);
128
129private:
130
131  ///Map of nodes of graph
132  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
133
134  ///Map of edges of graph
135  Graph::EdgeMap<BrokenEdge *> edgesmap;
136
137  ///Map of texts to write on edges
138  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
139
140  ///Map of texts to write on nodes
141  Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap;
142
143  ///Group of graphical elements of displayed_graph
144  Gnome::Canvas::Group displayed_graph;
145
146public:
147  ///Here we store the maps that can be displayed through properties.
148  MapStorage & mapstorage;
149
150private:
151  ///Indicates whether the button of mouse is pressed or not
152  int isbutton;
153
154  ///Stores the actual tool in hand
155  int actual_tool;
156
157  ///At this location was the mousebutton pressed.
158  ///It helps to calculate the distance of dragging.
159  double clicked_x, clicked_y;
160
161  ///Remembers which Gnome::Canvas::Item was pressed.
162  ///this variable is needed, because
163  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
164  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
165  Gnome::Canvas::Item * active_item, * target_item;
166  Node active_node;
167  Edge active_edge;
168  Edge forming_edge;
169
170  std::string nodemap_to_edit, edgemap_to_edit;
171
172  static const int zoom_step = 5;
173
174public:
175  ///We need to store mapwin, to be able to ask the appropriate values for properties of new items.
176  MapWin & mapwin;
177
178private:
179
180  ///pointer to the parent window
181  Gtk::Window * parentwin;
182
183};
184
185#endif //GRAPH_DISPLAYER_CANVAS_H
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